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Process Equipment and Plant Design

Process Equipment and Plant Design
The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is

1.25
0.25
0.75
0.5

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Process Equipment and Plant Design
Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

750
650
250
450

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Process Equipment and Plant Design
Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is

Less
Same
Cither A or B; depends upon the I.D. of the pipe
More

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Process Equipment and Plant Design
The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)

None of these
-q
-q/(1-q)
-q/(q-1)

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Process Equipment and Plant Design
The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from

0.5 to 1
1 to 1.5
1.5 to 2
2 to 2.5

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Process Equipment and Plant Design
Spherical shaped pressure vessel is considered to be the most ideal, because it can

Be fabricated very easily
Be supported very easily
Be designed without wind load considerations
Withstand higher pressure for a given metallic shell thickness

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